CN108233626B - Internal cooling and ventilating system of large synchronous phase modulator - Google Patents
Internal cooling and ventilating system of large synchronous phase modulator Download PDFInfo
- Publication number
- CN108233626B CN108233626B CN201810018055.3A CN201810018055A CN108233626B CN 108233626 B CN108233626 B CN 108233626B CN 201810018055 A CN201810018055 A CN 201810018055A CN 108233626 B CN108233626 B CN 108233626B
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- Prior art keywords
- air
- stator
- ventilation
- cooling
- rotor
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- 238000001816 cooling Methods 0.000 title claims abstract description 94
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 23
- 238000009423 ventilation Methods 0.000 claims abstract description 63
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 29
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 239000003607 modifier Substances 0.000 claims description 8
- 238000004804 winding Methods 0.000 claims description 7
- 239000004020 conductor Substances 0.000 claims description 4
- NEIHULKJZQTQKJ-UHFFFAOYSA-N [Cu].[Ag] Chemical compound [Cu].[Ag] NEIHULKJZQTQKJ-UHFFFAOYSA-N 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 3
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
- H02K2205/09—Machines characterised by drain passages or by venting, breathing or pressure compensating means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses an internal cooling and ventilating system of a large synchronous phase modulator, which comprises an inner shell, an outer shell, a water-air cooler and a cooling fan, wherein the inner shell is provided with a water inlet and a water outlet; wherein, the cooling fan is arranged outside the end part of the rotor; the water-air cooler is arranged below the stator; the inner shell is arranged at the periphery of the stator and is connected with the cooling fan and the water-air cooler to form an inner air area; the outer shell is arranged at the periphery of the inner wind area and connected with the inner shell to form a closed system; the part of the iron core of the stator, which is close to the outer side surface, is divided into a plurality of sections of stator iron core sections by radial ventilation ducts; a ventilation channel is arranged in the stator core in a penetrating way along the radial direction; an air inlet hole, an axial air duct and a radial hole are arranged in the rotor. The invention adopts a closed full air cooling mode for cooling, and has the advantages of high cooling efficiency, less auxiliary equipment, simple and convenient operation, low failure rate and convenient maintenance.
Description
Technical Field
The invention relates to a cooling and ventilating system, in particular to an internal cooling and ventilating system of a large synchronous phase modulator.
Background
The synchronous phase modifier is also called synchronous compensator, is a reactive compensation device, operates in a motor state, has no mechanical load, and only absorbs a small amount of active power from a power grid to supply power to the motor to consume. The reactive power can be provided for or absorbed by a power grid, the power factor is improved, the network loss is reduced, and the reactive power supply has better effects on adjusting the voltage of the power grid and improving the stability of the power grid.
Large synchronous phase modulators suffer from energy losses during operation, including losses in the stator core and windings, frictional losses between the gas and the rotor, and excitation losses, among others. This lost energy is converted to heat causing the synchronous phase modulator to increase in temperature. Therefore, a large synchronous phase modulator is usually equipped with a cooling system with excellent performance so that the temperature rise of the phase modulator meets the requirements of relevant working standards. If the cooling system is abnormal, the temperature of the phase modulator is increased by a light person, and the normal working effect is influenced; the heavy person may cause the consequences of burning out the stator core and windings, rotor coils, etc.
The traditional phase modifier cooling system mainly adopts the modes of full hydrogen cooling, water hydrogen cooling and double water internal cooling for cooling. However, the hydrogen production station needs to be arranged independently in the full hydrogen cooling process, and the cooling system and the phase modifier need to be subjected to explosion-proof treatment, so that the operation process is complex and the cost is high; the water-hydrogen cooling needs to be provided with two systems of water and hydrogen, and compared with the former system, the system has a more complex structure, has more severe requirements on operation personnel and has higher cost; the double-water internal cooling auxiliary system is complex in configuration, needs two complete water treatment and control systems, has high requirement on internal cooling water, needs chemical demineralized water, and is complex in equipment structure and high in operation cost.
Disclosure of Invention
The invention aims to provide an internal cooling and ventilating system of a large synchronous phase modulator, aiming at the defects of complex structure, complex installation and operation, high operation cost and the like of a cooling system of the large synchronous phase modulator in the prior art. The invention has the advantages of high cooling efficiency, less auxiliary equipment, simple and convenient operation, low failure rate and convenient maintenance.
In order to achieve the purpose, the invention adopts the following technical scheme:
an internal cooling and ventilating system of a large synchronous phase modulator comprises an inner shell, an outer shell, a water-air cooler and a cooling fan; the cooling fan is arranged outside the end part of the rotor, and preferably, the cooling fan is coaxial with the rotor; the water-air cooler is arranged below the stator, and a base air chamber is formed between the water-air cooler and the stator; the inner shell is arranged at the periphery of the stator and is connected with the cooling fan and the water-air cooler to form an inner air area together; the outer shell is arranged on the periphery of the inner wind area and connected with the inner shell to form a closed system; an air gap exists between the stator and the rotor; the part of the iron core of the stator, which is close to the outer side surface, is divided into a plurality of sections of stator iron core sections by radial ventilation channels; the stator comprises a stator core, a stator core section and a stator core section, wherein the stator core is provided with a ventilation channel which is arranged in the radial direction in a penetrating manner, so that a first ventilation area is formed in the stator core section, and a second ventilation area and a third ventilation area are formed in the iron core outside the stator core section; the third ventilation zone is communicated with the radial ventilation channel, so that cooling air can enter an air gap conveniently; the second ventilation area is communicated with the first ventilation area, so that cooling air in the air gap is guided to enter an air chamber of the machine base or enter a gap between the outer side surface of the stator and the inner shell through a ventilation channel in the stator iron core section; an air inlet hole, an axial air duct and a radial hole are formed in the rotor; the axial air duct is arranged in the rotor in a penetrating manner along the axial direction; the air inlet hole is arranged at the end part of the rotor and is communicated with the axial air channel, so that cooling air from the cooling fan can be conveniently guided to enter the axial air channel of the rotor; the radial holes are arranged in the rotor along the radial direction of the rotor and are communicated with the axial air duct.
Further, the number of the cooling fans is 2, and the cooling fans are respectively arranged outside two end parts of the rotor.
Preferably, the part of the stator core close to the outer side surface is divided into a plurality of stator core segments with equal length by the radial ventilation channels, such as 4 ~ 6 segments.
Further, the second ventilation area and the third ventilation area are arranged adjacently.
Preferably, when the stator and the rotor are both long, the part of the iron core of the stator, which is close to the outer side surface, is divided into 6 stator iron core sections with equal length by the radial ventilation channel, and 6 second ventilation areas and 5 third ventilation areas which are adjacently arranged are formed, namely, a five-inlet six-outlet ventilation path is formed, so that the cooling effect in the middle of the stator is enhanced, and the temperature distribution of the whole stator iron core is uniform.
Further, in the rotor, the number of the air inlet holes, the axial air channels and the radial holes can be set according to actual requirements, for example, the number of the axial air channels is set to be 4 ~ 12, and the number of the air inlets is correspondingly set according to the number of the axial air channels, preferably, each axial air channel is communicated with 5 ~ 10 radial holes.
Preferably, the rotor adopts a hollow conductor winding; furthermore, the hollow conductor winding is made of fine-drawn silver copper wires so as to improve the creep resistance.
In actual operation, the wind flow path is as follows: after cooling air from the water-air cooler enters the inner air zone through the cooling fan, a part of the cooling air directly enters the air gap; one part of the air enters a gap between the outer side surface of the stator and the inner shell or a stand air chamber along the axial direction; one part enters the axial air channel of the rotor through the air inlet hole of the rotor. The cooling air directly entering the air gap is intersected with the cooling air flowing out of the radial hole near the end part of the rotor, and after the outer surface of the rotor is cooled along the air gap, the cooling air enters the air chamber of the engine base from the second ventilation area through a ventilation channel in the iron core section of the stator or enters the air gap between the outer side surface of the stator and the inner shell and then enters the air chamber of the engine base, and then the cooling air is cooled by the water-air cooler and then returns to the cooling fan to form circulation; cooling air entering a gap between the outer side surface of the stator and the inner shell or the base air chamber along the axial direction enters the air gap through the third ventilation area, is shunted, is folded or is intersected with cooling air flowing out of a radial hole of the rotor, enters the base air chamber through a ventilation channel in the stator core section from the second ventilation area, or enters the gap between the outer side surface of the stator and the inner shell, then enters the base air chamber, is cooled by the water-air cooler and then returns to the cooling fan to form circulation; the cooling air entering the axial air duct of the rotor through the air inlet hole of the rotor cools the rotor along the axial direction and then enters the air gap through the radial holes of the rotor.
Has the advantages that: the internal cooling and ventilating system of the large synchronous phase modulator adopts a closed full air cooling mode for cooling, and the structure of the cooling system is optimally designed, so that the cooling efficiency and the cooling effect are greatly improved. Meanwhile, the cooling and ventilation system has the advantages of small number of auxiliary equipment, convenience in installation and use, contribution to reduction of equipment failure rate and workload of operation and maintenance, and reduction of use cost. In addition, the fan performance of the cooling and ventilating system is improved along with the increase of the lengths of the rotor and the stator within a certain range, and the rotor adopts an axial cooling and ventilating mode, so that the problem that the increase of the cold air volume of a rotor winding is hindered due to large wind resistance of an air inlet when the auxiliary groove at the bottom of the groove is ventilated in the radial direction is solved, and the cooling and ventilating system is particularly suitable for the cooling and ventilating of a large-capacity synchronous phase modulator.
Drawings
FIG. 1 is a schematic cross-sectional view of a large synchronous condenser internal cooling ventilation system of the present invention;
FIG. 2 is a schematic view of the rotor cooling ventilation configuration of the present invention;
in FIGS. 1-2: 1-radial ventilation channel, 2-stator iron core section, 3-rotor, 4-cooling fan, 5-air gap, 6-base air chamber, 7-water-air cooler, 8-second ventilation zone, 9-third ventilation zone, 10-air inlet hole, 11-axial air channel, 12-radial hole, 13-inner shell and 14-outer shell.
Detailed Description
The technical solution of the present invention is further explained by the following examples, but the scope of the present invention is not limited to the examples.
The embodiment is that the internal cooling ventilation system of the large synchronous phase modifier comprises an inner shell 13, an outer shell 14, a water-air cooler 7 and cooling fans 4, wherein 2 cooling fans 4 are respectively arranged on the outer sides of two end parts of a rotor 3 and are coaxial with the rotor 3, the water-air cooler 7 is arranged below the stator and forms a base air chamber 6 with the stator, the inner shell 13 is arranged on the periphery of the stator and is connected with the cooling fans 4 and the water-air cooler 7 to form an inner air area together, the outer shell 14 is arranged on the periphery of the inner air area and is connected with the inner shell 13 to form a closed system, an air gap 5 exists between the stator and the rotor 3, the part, close to the outer side face, of an iron core of the stator is divided into 6 stator iron core sections 2 with the same size by a radial ventilation duct 1, ventilation ducts are arranged in the iron core of the stator in a radial direction, a first ventilation area is formed in the stator iron core 2, 6 second ventilation areas 8 and 5 second ventilation areas 9 are formed in the iron core sections of the stator iron core 2 and are arranged in the iron core sections, the stator iron core sections 2, the stator iron core sections are arranged in a way of a fifth ventilation path, a radial direction, a third ventilation duct is formed in order to enhance the axial direction, the axial direction of the rotor.
In actual operation, the wind flow path is as follows: after the cooling air from the water-air cooler 7 enters the inner air zone through the cooling fan 4, a part of the cooling air directly enters the air gap 5; one part of the air enters a gap between the outer side surface of the stator and the inner shell 13 or the base air chamber 6 along the axial direction; a part enters the axial air channel 11 of the rotor 3 through the air inlet holes 10 of the rotor 3. The cooling air directly entering the air gap 5 is intersected with the cooling air flowing out from the radial hole 12 near the end part of the rotor 3, and after the outer surface of the rotor 3 is cooled along the air gap 5, the cooling air passes through the ventilation channel in the stator iron core section 2 from the second ventilation zone 8, enters the base air chamber 6 or enters the gap between the outer side surface of the stator and the inner shell 13, then enters the base air chamber 6, is cooled by the water-air cooler 7 and then returns to the cooling fan 4, and circulation is formed; cooling air entering a gap between the outer side surface of the stator and the inner shell 13 or the base air chamber 6 along the axial direction enters the air gap 5 through the third ventilation zone 9 and then is divided, and the cooling air is folded or is intersected with cooling air flowing out of the radial hole 12 of the rotor 3, then enters the base air chamber 6 through a ventilation channel in the stator iron core section 2 through the second ventilation zone 8 or enters the gap between the outer side surface of the stator and the inner shell 13 and then enters the base air chamber 6, and returns to the cooling fan 4 after being cooled by the water-air cooler 7 to form circulation; the cooling air entering the axial duct 11 of the rotor 3 through the inlet openings 10 of the rotor 3 cools the rotor 3 axially and then enters the air gap 5 through the radial openings 12 of the rotor 3.
The technical scheme is explained by applying specific examples, and the above examples are only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (7)
1. An internal cooling and ventilating system of a large synchronous phase modifier is characterized by comprising an inner shell (13), an outer shell (14), a water-air cooler (7) and a cooling fan (4); wherein, the cooling fan (4) is arranged outside the end part of the rotor (3); the water-air cooler (7) is arranged below the stator, and a base air chamber (6) is formed between the water-air cooler and the stator; the inner shell (13) is arranged at the periphery of the stator and is connected with the cooling fan (4) and the water-air cooler (7) to form an inner air area together; the outer shell (14) is arranged at the periphery of the inner wind area and connected with the inner shell (13) to form a closed system; an air gap (5) exists between the stator and the rotor (3); the part of the iron core of the stator, which is close to the outer side surface, is divided into a plurality of stator iron core sections (2) by a radial ventilation duct (1); a ventilation channel is arranged in the iron core of the stator in a penetrating way along the radial direction, so that a first ventilation area is formed in the iron core section (2) of the stator, and a second ventilation area (8) and a third ventilation area (9) are formed in the iron core outside the iron core section (2) of the stator; the third ventilation zone (9) is communicated with the radial ventilation channel (1) so as to facilitate cooling air to enter the air gap (5); the second ventilation area (8) is communicated with the first ventilation area, so that cooling air in the air gap (5) is guided to enter the air chamber (6) of the machine base or enter a gap between the outer side surface of the stator and the inner shell (13) through a ventilation channel in the stator iron core section (2); an air inlet hole (10), an axial air duct (11) and a radial hole (12) are formed in the rotor (3); the axial air duct (11) is arranged in the rotor (3) in a penetrating manner along the axial direction; the air inlet hole (10) is arranged at the end part of the rotor (3) and is communicated with the axial air channel (11), so that cooling air from the cooling fan (4) can be conveniently guided to enter the axial air channel (11) of the rotor (3); the radial holes (12) are arranged in the rotor (3) along the radial direction of the rotor (3) and are communicated with the axial air duct (11).
2. The internal cooling ventilation system of large-scale synchronous phase modifier according to claim 1, characterized in that the number of said cooling fans (4) is 2, respectively arranged outside of both ends of the rotor (3).
3. A large synchronous phase modifier internal cooling ventilation system as claimed in claim 1 or 2, wherein the stator core near the outside is divided into multiple stator core segments of equal length by radial ventilation ducts (1).
4. A large synchronous phase modifier internal cooling ventilation system as claimed in claim 3, characterized in that the part of the stator core near the outer side is divided into 4 ~ 6 stator core segments of equal length by radial ventilation ducts (1).
5. Large synchronous phase modulator internal cooling ventilation system according to claim 1 or 2, characterized in that the second ventilation zone (8) and the third ventilation zone (9) are arranged adjacently.
6. A large synchronous phase modulator internal cooling ventilation system according to claim 1 or 2, characterized in that the rotor (3) uses hollow conductor windings.
7. The internal cooling ventilation system of large synchronous phase modulator according to claim 6, wherein said hollow conductor winding is made of fine-drawn silver copper wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018055.3A CN108233626B (en) | 2018-01-09 | 2018-01-09 | Internal cooling and ventilating system of large synchronous phase modulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018055.3A CN108233626B (en) | 2018-01-09 | 2018-01-09 | Internal cooling and ventilating system of large synchronous phase modulator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108233626A CN108233626A (en) | 2018-06-29 |
| CN108233626B true CN108233626B (en) | 2020-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810018055.3A Expired - Fee Related CN108233626B (en) | 2018-01-09 | 2018-01-09 | Internal cooling and ventilating system of large synchronous phase modulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108233626B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838765A (en) * | 2019-11-28 | 2020-02-25 | 国网江苏省电力有限公司检修分公司 | Stator cooling system of synchronous phase modulator |
| CN114825770B (en) * | 2022-05-05 | 2023-01-03 | 哈尔滨理工大学 | Distributed synchronous phase modulator stator yoke back and rotor retaining ring cascade water cooling system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101136568A (en) * | 2007-10-08 | 2008-03-05 | 南阳防爆集团有限公司 | Cooling system of high capacity synchronous generator |
| JP2013176235A (en) * | 2012-02-27 | 2013-09-05 | Mitsubishi Electric Corp | Rotary electric machine |
| CN103607073A (en) * | 2013-11-30 | 2014-02-26 | 永济新时速电机电器有限责任公司 | Efficient cooling motor with three independent wind-path structures |
-
2018
- 2018-01-09 CN CN201810018055.3A patent/CN108233626B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101136568A (en) * | 2007-10-08 | 2008-03-05 | 南阳防爆集团有限公司 | Cooling system of high capacity synchronous generator |
| JP2013176235A (en) * | 2012-02-27 | 2013-09-05 | Mitsubishi Electric Corp | Rotary electric machine |
| CN103607073A (en) * | 2013-11-30 | 2014-02-26 | 永济新时速电机电器有限责任公司 | Efficient cooling motor with three independent wind-path structures |
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| CN108233626A (en) | 2018-06-29 |
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